Why it is poisonous to cats
The leaves and stem of a dieffenbachia hold tiny, sharp crystals. When a cat bites a leaf, they lodge in the lining of the mouth: the mouth, tongue and throat turn red, become painful and can swell.
The cat drools heavily, paws at its mouth, and may vomit, refuse food or struggle to swallow. Contact a vet if these signs do not stop. If the mouth or throat swells so much that the cat struggles to breathe, contact a vet straight away.
The sap irritates the eyes and the skin too, so it is better to keep a dieffenbachia where your cat cannot reach it.
What to watch out for
- The mouth, tongue and throat can turn red and swell.
- The cat drools heavily and paws at its mouth.
- Vomiting can follow, and the cat may refuse food and struggle to swallow.
- If the throat swells badly, the cat can struggle to breathe.
- The sap irritates the eyes if it gets into them.
Which parts are dangerous
Not every part of the plant is equally dangerous.
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Leaves and stem
Not safeThe crystals in them irritate the mouth as soon as the cat bites.
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Sap
Not safeIt irritates the mouth, the eyes and the skin.
What it can cause
Signs that can appear after eating it. Each page explains what to look out for and when to hurry to a vet.
Safe plants instead
Plants that are safer to keep.